Use this tool to calculate the approximate amount of grout needed to complete your job. Coverages provided are approximate and are for estimating purposes only.
IWT is a proud distributor of Merkrete quality setting products. Every Merkrete product offered is refined to achieve results that are expected from the experienced craftsmen that use them. Precise products that are simple to use, environmentally friendly, durable, and trusted value are the key influences of their innovations.
Square Edge / Rectified & Rectangular Tile Installation Guidelines
The TCNA (Tile Council of North America) Handbook addresses the grout line size issue by recommending that the width of the grout joint be determined by the ANSI A108.02 specification.
The specification states that regardless of size, but especially for large format tiles, rectified or pressed tiles laid with a straight or offset joint should be utilized with a
minimum grout joint to take into account for warpage.
The minimum recommended grout joints are as follows:
Pressed Tiles- 3/16" minimum grout joint regardless of pattern
Rectified Tiles- 1/8" minimum grout joint regardless of pattern
Natural Stone- 1/16" minimum patterns may vary
In addition, ANSI A 108.02 Section 18.104.22.168 states that for running bond/joint brick patterns utilizing tiles (Square or rectangle) where the side being offset is greater than
14" (nominal dimension), the running board offset will be a maximum of 33% unless otherwise specified by the manufacture. Use constitutes acceptance.